Virulence for chick embryos of Escherichia coli from cattle. I. LD-50 values, and the effects of dead bacteria, culture filtrates and crude endotoxin.
D000818:Animals; D002417:Cattle; D002642:Chick Embryo; D004731:Endotoxins / Q000633:toxicity*; D004926:Escherichia coli / Q000472:pathogenicity*; D014774:Virulence
D004731:Endotoxins